<h1>appComponent组件</h1>
<!-- <app-nice-three></app-nice-three> -->
<!-- <app-event-bind></app-event-bind> -->
<!-- <app-attr-direct></app-attr-direct> -->
<!-- <app-stur-direct></app-stur-direct> -->
<!-- <app-template-var></app-template-var> -->
<!-- <app-two-data></app-two-data> -->
<!-- <app-pipe-fun></app-pipe-fun> -->
<app-parent></app-parent>